When exporting an H264 MP4 (haven't tried other codecs) from Premiere or Media Encoder using 2021 versions (tested 15.0, 15.2, 15.4 beta) to a shared storage volume connected using AFP (AppleShare), the last 5 seconds of any export image and audio glitches and freezes while the file continues the remaining seconds. The file itself doesn't appear corrupt but the video content isn't complete.
Premiere 14.9 works and all previous versions. Connecting using SMB works. Exporting local works.
The AFP connection is going through Acronis which runs on a Windows server, so the issue could be isolated to that potentially. First time ever experiencing this type of issue.
Issue is reproduced from multiple machines on the same network.